Gummed paper.



' C. H. CROWELL.

GUMMED PAPER. APPLIUA'HON FILED Nov. 1a. 1901.

Amon article of manufacture and sale. comprises paper having upon one side thereof `"cHARLiazs H. cRowE'LL, oF sWAMPscoTT, MASSACHUSETTS.

Gummi) HAPER.

iva-930,648.

To all'whom it may concern:

Be it known that I, CHARLES H. CRcwELL, citizen of the `United States, residing at Swampscott, Essex county', State of Massa. chusetts, have invented a certain new and useful Improvement in Gummed- Paper, of which the following is a specification, reference being had therein t0 the accompanying drawings.

My invention has for its object to provide a gummed paper which shall not, in drying, or under the influence of changes in temperature or moisture, curl or roll up as does all gummed paper at present produced so far as known to me. l

As is well known, gummed paper is a coman adhesive coating or layer composed of "gum or the like.- It is usually made in sheets or strips by coating one side of the paper with the gum or adhesive compositgon, the latter beingapplied vmoist and then allowed to dry. The aper thus produced may be handled, pac ed, shipped, Stored, and used whenever desired, it belng only necessary tov moisten the gummed surface or coating before the paper is applied to use. A serious objection to this ummed paper, as at present made so far as known to me, is that it curls or rolls and will not remain in a flat, or substantially Hat, condition. The curling or rollin is due to the dryin and subsequent shrin age of the adhesive ayer, which as before stated, is applied in a moist condition to a sheet of dry paper, and is then allowed to dry. In the process of dr 'ng, the adhesive coating or gummed ayer shrinks with the result that the paper is caused to curl or roll up. In usin this paper, the fact that it is curled or rolled up, as above stated, Very seriously interferes with its use for many purposes. Itis apt to be cracked or impaired in being straightenedV out, and the straightening of it out and holding it in a straight or su stantially flat condition whlle it 1s being moistened prepara. try to use, not only interferes with the best results in Vits use, but requires a considerable expenditure of'time on the art of the user I which would not be required 1f the paper was iiat and would remain flat. In other words, the fact that the `aper is' curled andtwisted interferes with t e character of the lwork,

and the speed ofthe operator or user, to a' very conslderable extent, as-will be c lear .Specication of Letters Paten Application med 'November 1s, 1907. serial No. 402,596.V

A Patented Aug. 10, 1909.

The object of my present invention is to produce a gummed pa er which shall not curl or twist, but whic shall remain subfrom the objections above noted.

My invention will be readily understood from the following description taken inconne'ction with the accompanying drawing and and clearly defined in the claims at/the close of this specification.

In the accompanying drawing I have shown one embodiment of my invention.

from the large ro l or source of supply B is shown.l The paper is uided by means of suitable guide rolls as in the well known manner, so as to be immersed one or more ,times in the moistenin passes between suitab e squeeze rolls E; thence by means of suitable guide rolls as F and K to a gum roll G Working in the well known manner in a vessel H containing the adhesive mixture. dry rolls, or other well known drying means. This arrangement is only one of many similar arrangements of rolls and baths and gum applying device which may be used in the pro- The pa er should pass through the moistening batli a sufficient length of time before it reaches the point at which the adhesive is applied to permit the paper to become thorthe influence of the moisture. The paper thus moistened and e; anded then has the adhesive coating applie thereto in the usual way by the well known means. After the adover the usual hot rolls or is otherwise pro erly dried in any well known manner. n` this way the moist adhesive is applied to the moist paper and both the layer of adhesive so shrink uniformly and there is no tendency of the adhesive layer to cause the paper to curl' or twist.

I have found in practice that simply the adhesive to the moist paper an then drying the Whole gives 'satisfactory results and enables me to produce a gummed paper which will remain substantially flat. It may -Hpaper'and in using certain inds' of adhesive mixtures or compositions t 'at for` the best st'antially flat and shall therefore be free 60 the nove"^features thereof are pointed out In said drawin the path of the# paper A bath D; thence it From thence it passes to duction of my improved gummed paper.

oughly molstened and to expand fully under hesive is applied the still moist paper passes 95.

and the layer of paper are dried together and moistenin'g the paper thoroughly, ap lying 105 howeverffbefound in drying some kinds of results it would be desirableto-modify the application of the moisture to the paper with v.a View to: obtaining such a degree of moisture as will insure a substantially equal shrinkage v water bath and wetting the paper throughout the thickness thereof, then passing the wetted paper between squeezing rollers to expel surp us moisture and to leave the paper in a uniformlyexpanded and moistened condition throughout its thickness, then applying to one sideonly'of the paper thus wetted and expanded a liquid adhesiwewhile the paper is stlll in its expanded and moistened condition throughout, then drying and shrinking simultaneously and uniformly both the paper and the adhesive thereon while the former is maintained stretched. y

2'. The process of making dry ygummed paper which consists in expanding dry, un- I gummed paper by feeding the same continuously from the, roll and passing it throu h f a liquid bath and wetting the paper throug out the thickness thereof, then passing the wetted pa er between squeezing rollers to expel surp us moisture and to leave the paper in a uniformly expanded and moistened. condition throughout its thickness, then ap plying to one sideA only of the aper thus wetted and expanded a liquidad esive whilethe paper isrstill in its expanded and moistened\ condition throughout, then drying and shrinking simultaneously and uniformly both the paper and the adhesive thereon -while the former is maintained stretched, 

